2.6.- Oxygen uptake rate (OUR)
Determination of the oxygen uptake rate (OUR) was performed by applying
the dynamic method (Yoon and Konstantinov, 1994; Zhou and Hu, 1994).
This method is based on interrupting the air inflow to the bioreactor
for few minutes. Then dissolved oxygen concentration decreases due to
the respiratory activity of the cells and to the oxygen desorption from
the liquid phase to bioreactor headspace. The specific methodology used
in this work is detailed somewhere else (Fontova et al., 2018; Lecina et
al., 2006; MartÃnez-Monge et al., 2018b; MartÃnez-Monge et al., 2019b).